Logging In and Out
When you login, you set a cookie on your machine so that you can browse the forums without having to enter your username and password each time. Logging out clears that cookie to ensure nobody else can browse the forum.

To login, simply click the login link at the top left hand corner of the forum. To log out, click the log out link on the same place. In the unlikely event, that you cannot log out, clearing cookies on your machine will take the same effect.